56858 Ver la hoja de datos (PDF) - Freescale Semiconductor
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56858 Datasheet PDF : 64 Pages
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Introduction
Table 3-1 56858 Signal and Package Information for the 144-pin LQFP and MAPBGA
Signal
Name
HDS
BGA LQFP
Pin No. Pin No.
C8
116
Type
Input
Description
Host Data Strobe (HDS)—When the HI08 is programmed to interface
to a single-data-strobe host bus and the HI function is selected, this
input enables a data transfer on the HI when HCS is asserted.
These pins are disconnected internally during reset.
HWR
GPIOB12
HCS
D8
GPIOB13
HREQ
B8
HTRQ
GPIOB14
Input
Host Write Enable (HWR)—This signal is the Write Data input when
the HI08 is programmed to interface to a double-data-strobe host bus
and the HI function is selected.
Input/Output Port B GPIO (12)—This pin is a General Purpose I/O (GPIO) pin when
not configured for host port usage.
117
Input
Host Chip Select (HCS)—This input is the chip select input for the
Host Interface.
These pins are disconnected internally during reset.
Input/Output Port B GPIO (13)—This pin is a General Purpose I/O (GPIO) pin when
not configured for host port usage.
118
Open Drain Host Request (HREQ)—When the HI08 is programmed for HRMS=0
Output
functionality (typically used on a single-data-strobe bus), this open
drain output is used by the HI to request service from the host
processor. The HREQ may be connected to an interrupt request pin of
a host processor, a transfer request of a DMA controller, or a control
input of external circuitry.
These pins are disconnected internally during reset.
Open Drain
Output
Transmit Host Request (HTRQ)—This signal is the Transmit Host
Request output when the HI08 is programmed for HRMS=1
functionality and is typically used on a double-data-strobe bus.
Input/Output Port B GPIO (14) —This pin is a General Purpose I/O (GPIO) pin
when not configured for host port usage.
56858 Technical Data, Rev. 6
Freescale Semiconductor
15
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